INTERCHANGEABLE LENS CAMERA, CAMERA BODY, LENS UNIT, AND BUSY SIGNAL CONTROL METHOD

摘要

An aspect of the present invention provides an interchangeable lens camera having a camera body and a lens unit that is freely attachable and detachable to the camera body. In the interchangeable lens camera, a communications unit in the camera body sends via communications terminals (MT_MOSI and MT_MISO) an INTR_BUSY control instruction that instructs whether to make notification with a busy signal (INTR_BUSY signal) for any operation out of a plurality of types of operations that can be executed, and the lens unit or camera body communications unit sets the busy signal (INTR_BUSY) to an ON state (low level) only during the period of operation of the type indicated by the INTR_BUSY control instruction.

主权项

1. An interchangeable lens camera including a camera body and a lens unit attachable to and detachable from the camera body, wherein
each of the camera body and the lens unit includes a communication signal terminal for instruction from the camera body to the lens unit, paired busy signal terminals for a busy signal indicating whether now is during a period of an operation, and a communicating part which performs communications via the communication signal terminal and the busy signal terminal, the communicating part of the camera body transmits via the communication signal terminal to the lens unit a busy signal control instruction that can indicate a type of an operation that can be performed by the lens unit and indicates a type of an operation of a notification target of the busy signal, before the busy signal is set to an ON state, and upon receiving the busy signal control instruction, the communicating part of the lens unit retains the type of the operation indicated by the busy signal control instruction in a memory, and sets the busy signal corresponding to the operation of the type retained in the memory to an ON state only during the operation of the type indicated by the busy signal control instruction and every time the operation of the type retained in the memory is performed.